Legend then re-tweeted his wife's announcement, but they did not shared any further details about their new family member.

Chrissy Teigen and John Legend

Getty

The Sports Illustrated model announced she was pregnant with the couple's second child last November.

"It's John's!" she hilariously captioned a video of her baby bump.

Their little boy joins daughter Luna, 2.

Natasha PriceWhen she's not at work writing about the latest celebrity news, binge-worthy TV show or royal events, Natasha can be found planning her next holiday and scrolling Instagram for a new café to check out. You can find her 'gramming @natashavprice or Tweeting @natashaprice